Rotary motor.



Patented Apr. 3, i900.

I. KELLER. ROTARY MOTOR. (Application filed Aug. 26, 1899.,

4 Sheets-Sheet (ND Model.)

THE mama warms cu. mo'Yo-umo" wasmuomu a c No. 646,702. Patented Apr.3,- I900. J. KELLER.-

BDTABY MOTOR.

(Application fllad Aug. 26, 1899.) (No Model.)

4 sheets-sheet 2.

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, Patented Apr. 3, I900. .1. KELLER.

ROTARY MOTOR. (Application filed Aug. 26, 1899.) (No Model.)

4 Sheets-Sheat 3.

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No. 646,702. v Patented Apr. 3, I900.

' J. KELLER,

ROTARY MOTOR.

(Apiflication filed Aug. 26, 1899.)

4 Sheets-Sheet 4.

(No Model.)

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UNITED STATES JULIUS KELLER, OF PHILADELPHIA,

PENNSYLVANIA, ASSIGNOR TO THE KELLER TOOL COMPANY, OF PENNSYLVANIA.

ROTARY MOTOR.

srncrrronrron forming part of Letters Patent No. 646,702, dated April 3,1900.

Application filed August 26, 1899. Serial No. 728,540. (No model.)

To all whom it may concern:

Be it known that I, JULIUS KELLER, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and useful Improvement in Rotary Motors or Drills,which improvement is fully set forth in the following specification andaccompanying drawings.

My invention consists of an improved construction of a rotary motor inwhich provision is made for readily reversing the direction of rotationthereof in a simple and effective manner, said motor having also a cylinder-head set eccentric to the bore of the cylinder and concentric tothe axis of the piston and having a pin depending there'- from, said pinbeing concentric to the bore of the cylinder and eccentric to thepiston, whereby said pin acts as a central bearing for thepiston-blades.

It also consists of a novel construction of packing-strips seated in theouter edgeof the piston-blades, said strips having projections extendinginto the blades and port-holes on either side of said blades, wherebyair-pressure is admitted to hold the packing-strips against thecylinder, thus making a tight and effective packing for the piston whenthe latter is rotated in either direction.

It further consists of novel details of construction, all as will behereinafter fully set forth, and particularly pointed out in the claims.

Figure 1 represents a vertical sectional view of a rotary motorembodying my invention, a portion thereof being shown in elevation. Fig.2 represents a side elevation of a portion of a rotary sleeve employed,showing the stops for limiting the movement thereof. Fig. 3 represents asection on line a: m, Fig. 1. Fig. 4 represents a plan view of thebottom of the motor-casing, showing especially the location of thecentral pinion employed. Fig. 5 represents a top plan view of thegearing in the lower portion of the motor-casing. Fig. 6 represents abottom plan view of the mo tor-casing and its piston. Fig. 7 representsa bottom plan view of the interior of the motorcasing, showing the headand the pin eccentric thereto. Fig. 8 represents a sectional view of themotor-casing, showing the eccentric head therein and a depending pin,which latter is concentric with the motor-cylinder.

Fig. 9 represents a section on line y 3 Fig.

1. Fig. 10 represents a perspective view of a packing-strip employed,the same being shown in detached position. sents a side elevation of oneof the piston- Fig. 11 repreblades, a portion of the same being brokenaway, showing the relative position of the packing-strip and the portsfor admitting airpressure thereto. Figs. 12, 13, and '14 representsec-tion's on line 2 z, or so, and y y, Fig. 11.

Similar letters of reference indicate corresponding parts in thefigures.

Referring to the drawings,A designates the casin g of the motor, thesame having the head B at the upper portion thereof and eccentric to thebore 0 of the cylinder D.

E designates a rod engaging the head B and externally threaded, so as tobe engaged by the feeding device F.

G designates an inlet-pipe for the motive fluid, said pipe engaging theinlet-chamber H, whose outer surface is inclosed by the rotatable sleeveor valve J ,which latter is threaded at K and adapted to be locked inthe desired position by means of the lock-nuts'L.

The inlet-chamber H is provided with the ports M and N, which leadthrough the passages P and Q to the chambers R and S at either side ofthe piston T.

U designates an inlet-passage at one side of the sleeve J, wherebycommunication is formed between M and P, and V designates anexhaust-passage at the opposite side thereof, whereby an exhaust oroutlet is provided from the passage Q to the main exhaust-pas- 9o Thepiston Tconsists of the ring C, which is provided with the cylindricalWalls D, in which are located the upright bearings E, which are slottedso as to permit the pistonblades F to pass therethrough, said bladesprojecting from the hubs or bearings G,which are rotatably mounted onthe pin H, which is located concentric to the bore of the cylinder D,but eccentric to the head B, which latter has the projecting portion J,which serves as a bearing for the piston-cap L.

Each of the blades F are provided at their outer edges with a recess M,which extends longitudinally thereof, said recess being adapted for thereception of the packingstrips N, which latter have the pins or plungersP' projecting therefrom and entering the recesses Q, which are providedwith openings R, open at one side of the blades F, the latter beingprovided on their opposite sides with the openings S, wherefrom it willbe apparent that the air-pressure on either side of the piston can beutilized to hold the packing-strips N against the contiguous wall of thecylinder D.

The lower portion of the piston T carries a pinion T, which is adaptedto intermesh with the idlers U, which are in mesh with the stationaryrack V, which is in the present instance suitably secured in positionbetween the sections of the casings Wand X, respectively.

Y designates a pin on which is mounted each of the idlers U, each pinhaving a depending portion Z, which engages the yoke A adjacent whichare the thrust-bearings B and 0 said bearings having the balls Dinterposed therebetween.

E and F designate thrust-bearings, between which latter are located theballs G The yoke A at its lower portion is threaded internally andexternally, the external threads being engaged by the thrust-bearingnuts .1", while the internally-threaded portion is engaged by thechuck-nut K by means of which latter the chuck L is held in position.

The operation is as follows: When the parts are in the position seen inFig. 9, it will be apparent that the compressed air or other fluidentering the passage H will pass thence through the passages M, U, and Pinto the chamber R, and thence to the interior of the cylinder. Themotive fluid is now pressing against the left-hand piston-blade,whereupon the piston will turn from left to right, as will be readilyunderstood, the exhaust taking place through the passage S, ports Q V,and passage W. The piston shell or cylinder C consequently has a rotarymotion imparted thereto, the cap of said piston having its hearingagainst the lower depending portion of the head B, it being apparentthat the pinion T will revolve in unison therewith, the rotation of saidpinion causing the idlers U to be also rotated by reason of theirengagement with the stationary rack V and the rotation of said idlersbeing transmitted to the chuck L by the intermediate mechanism, as willbe apparent to those skilled in the art. Upon turning the sleeve J in anopposite direction to the other position than that shown in Fig. 9, thelimit of movement thereof being determined by the abutments or pins A B,it will be apparent that the direction of the How of the motive fluidwill be changed, the same entering the port Q and exhausting through theport P, whereby the direction of rotation is reversed, as is evident.

In a contemporaneously-pending application filed by me October 25, 1899,hearing Serial No. 734,712, I have shown, described, and claimed a novelconstruction of reversingvalve of somewhat similar construction to thereversing-valve shown herein, and to which I have made no claim in thisapplication.

It will be apparent that slight changes may be made by those skilled inthe art which will come within the scope of my invention, and I do nottherefore desire to be limited in every instance to the exactconstruction I have herein shown and described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a rotary motor, a cylinder having an inlet-chamber, right and leftair-chambers adapted to serve as inlet and exhaust passages, and arotatable sleeve mounted on said inlet-chamber and adapted to reversethe inlet and exhaust of the motive fluid, said sleeve having on oneside an exhaust-passage adapted to form communication between one ofsaid chambers and the main exhaust-passage, while the other side of saidsleeve has a passage forming a communication between said inlet-chamberand the other of said air-chambers.

2. In a rotary motor, the combination of a cylinder, a casing therefor,a cylinder-head set eccentric to the bore of the cylinder and concentricto the axis of the piston contained therewithin, said head projectingwithin the piston and acting as a bearing for the cap of said piston,-the latter having blades with re cesses therein, packing-strips seatedin said recesses, pins projecting from said packingstrips into saidblades, means for admitting pressure upon the ends of said pins from oneside of said piston and means for admitting pressure on the edges ofsaid blades from the opposite side of said piston.

3. The combination of a cylinder, a head set eccentric to the bore ofthe cylinder, a pis ton within said cylinder, said head being eccentricto the axis of said piston, a pin depending from said head, said pinbeing concentric to the bore of the cylinder and eccentric to the pistonand acting as a central hearing for the piston-blades, the latter havingrecesses therein, packing-strips seated in said recesses, pinsprojecting from said packingstrips into said blades, means for admittingpressure upon the ends of said pins from one side of said piston andmeans for admitting pressure on the edges of said blades from theopposite side of said piston.

4. In a rotary motor, a piston consisting of blades, recesses in theends of said blades, packing-strips set in said recesses, pinsprojecting from said packing-strips into said blades, means foradmitting pressure upon the ends of said pins from one side of saidpiston and means for admitting pressure upon the inner edges of saidblades from the opposite side of said piston.

5. In a rotary motor, an inlet-chamber, a rotary sleeve mounted thereon,inlet and exhaust passages for said motor, ports in said sleeve forpermitting the inlet and exhaust of the motive fluid in either directionto said motor, said fluid passing through said sleeve in each directionin both the normal and reversed positions thereof, a projection on saidsleeve and abutments for limiting the movement of said sleeve.

6. In a rotary motor, an inlet-chamber, a movable member or sleevemounted thereon, inlet and exhaust passages for said motor, and ports insaid member for permitting the inlet and exhaust of the motive fluid ineither direction relative to said motor, said fluid passing through saidmember in each direction in both the normal and reversed positionsthereof.

7. In a rotary motor, an inlet-chamber, a sleeve movably mountedthereon, inlet and exhaust passages for said motor, ports in said sleevefor permitting the inlet and exhaust of the motive fluid in eitherdirection, relative to said motor, said fluid passing through saidsleeve in each direction in both the normal and reversed positionsthereof, and means for'locking said sleeve in the desired positionrelative to said motor.

8. In a rotary motor, an inlet'chamber, a sleeve movably mountedthereon, inlet and exhaust passages for said motor, ports in said sleevefor permitting the inlet and exhaust of the motive fluid in eitherdirection, relative to said motor, said fluid passing through saidsleeve in each direction in both the normal and reversed positionsthereof, and means for locking said sleeve in the desired positionrelative to said motor, in combination with means for limiting themovement of said sleeve in either direction.

JULIUS KELLER. Witnesses:

JOHN A. WIEDERSHEIM, WM. OANER WIEDERSHEIM.

